Other options include using a hot pack an electric heat pad set on its lowest setting or a radiant heat lamp with a 250 watt reflector heat bulb to warm specific muscles and joints.
The vital part of the incandescent electriclamp is the tungsten wire inside the bulb.
白炽电灯的关键部分是灯泡里的钨丝。
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It is like turning on an electriclamp. A person who does not know about electricity will try at the bulb instead of the switch, so the lamp does not light.